Unprecedented rains in North Karnataka from 29th Sep 2009 onwards flooded several districts and cut off areas like Bijapur, Bagalkot and Bellary, some places receiving over 50 cms of rains in a single day. The floods inundated the Krishna and Tungabhadra rivers. Karnataka released 25 lakhs cusec of water from Almatti and Narayanpur dams in a single day, a record of sorts. http://indianairforce.nic.in/show_page.php?pg_id=115

Unprecedented rains in North Karnataka from 29th Sep 2009 onwards flooded several districts and cut off areas like Bijapur, Bagalkot and Bellary, some places receiving over 50 cms of rains in a single day. The floods inundated the Krishna and Tungabhadra rivers. Karnataka released 25 lakhs cusec of water from Almatti and Narayanpur dams in a single day, a record of sorts. Ref:http://indianairforce.nic.in/show_page.php?pg_id=115

Unprecedented rains in North Karnataka from 29th Sep 2009 onwards flooded several districts and cut off areas like Bijapur, Bagalkot and Bellary, some places receiving over 50 cms of rains in a single day. The floods inundated the Krishna and Tungabhadra rivers. Karnataka released 25 lakhs cusec of water from Almatti and Narayanpur dams in a single day, a record of sorts. Ref:http://indianairforce.nic.in/show_page.php?pg_id=115

OUTPUT DATA

Distance from Dam (km)

Max. Water Surface Elevation

Max. Flow (Cumecs)

Time to Max. Elevation (hr.)

Max. Velocity (m/s)

.000

518.76

111742

4.300

4.53

10.891

513.35

107278

4.900

4.24

20.421

508.65

105740

5.300

4.04

29.951

503.95

104716

5.700

3.87

39.481

499.10

103836

6.100

3.77

50.372

492.96

103076

6.500

3.82

59.902

485.89

102738

6.800

4.32

69.906

471.63

102596

7.100

5.44

79.772

456.29

102482

7.500

5.69

89.639

441.14

102380

7.800

5.88

99.505

426.10

102283

8.100

6.06

109.371

411.14

102190

8.400

6.23

119.237

396.26

102099

8.700

6.40

129.104

381.56

101993

9.100

6.54

140.864

369.36

101675

9.600

5.39

150.336

362.70

101331

10.000

5.06

159.808

356.38

100892

10.500

4.75

169.279

350.62

100256

11.200

4.40

180.461

345.06

99211

11.900

4.11

189.626

340.87

98221

12.700

4.13

200.623

336.39

96716

13.800

4.08

209.788

333.38

95130

14.700

3.93

220.785

330.68

93021

15.500

3.60

229.950

329.02

91340

16.000

3.30

240.175

327.31

89621

16.400

3.27

250.400

325.57

88021

16.900

3.24

260.625

323.78

86597

17.200

3.23

269.146

322.22

85597

17.500

3.21

279.372

320.25

84663

17.800

3.21

289.597

318.11

84038

18.000

3.25

299.822

315.72

83721

18.200

3.35

304.934

314.38

83679

18.200

3.43

ALAMATTI DAM BREAK ANALYSIS (CASE-4)

Data used as input for US based NWS DAMBRK Model Analysis

FRL – 519.6m

Storage- 130 TMC Time of Breach- 2hrs

Roughness Coefficient-0.05.,

Breach-Width-450m

Height of Breach - Full Dam Height IDF – 45,000 Cumecs

--------------------------------------------------------------

Unprecedented rains in North Karnataka from 29th Sep 2009 onwards flooded several districts and cut off areas like Bijapur, Bagalkot and Bellary, some places receiving over 50 cms of rains in a single day. The floods inundated the Krishna and Tungabhadra rivers. Karnataka released 25 lakhs cusec of water from Almatti and Narayanpur dams in a single day, a record of sorts. Ref:http://indianairforce.nic.in/show_page.php?pg_id=115

Distance from Dam (km)

Max. Water Surface Elevation

Max. Flow (Cumecs)

Time to Max. Elevation (hr.)

Max. Velocity (m/s)

0

517.91

108629

3.000

4.48

10

512.30

103399

3.700

4.19

20

507.51

100367

4.200

3.98

30

502.76

97765

4.700

3.82

40

497.20

95405

5.200

3.69

50

491.78

94044

5.600

3.71

60

484.92

93419

5.900

4.16

70

470.77

93170

6.200

5.27

80

455.44

92975

6.600

5.50

90

440.27

92793

6.900

5.68

100

425.20

92619

7.200

5.85

110

410.21

92459

7.600

6.01

120

395.29

92300

7.900

6.17

130

380.52

92125

8.200

6.32

140

368.11

91616

8.800

5.18

150

361.50

91090

9.200

4.86

160

355.17

90475

9.600

4.57

170

349.34

89642

10.200

4.24

180

343.64

88338

10.800

3.96

190

339.27

87196

11.400

3.98

200

334.46

85621

12.200

3.93

210

331.16

84017

13.000

3.78

220

328.24

81848

13.900

3.45

230

326.54

80111

14.400

3.12

240

324.84

78352

14.900

3.09

250

323.11

76705

15.400

3.07

260

321.34

75180

15.900

3.05

270

319.50

73841

16.300

3.05

280

317.88

72951

16.600

3.05

290

315.78

72241

16.800

3.07

300

313.42

71913

17.000

3.17

304

312.09

71873

17.000

3.25

A.P.STATE KNOWS HOW TO GET DAM BREAK ANALYSIS REPORTS PREPARED FOR IRRIGATION PROJECTS,BUT FAILED TO GET IT DONE FOR ALAMATTI DAM AND THEREBY MISLEAD KRISHNA TRIBUNAL WHO ILLEGALLY DECIDED ON ALAMATTI DAM HEIGHT

Stae of art technology in Water Resoures Management emphasises smaller dams and barrages for augmenting water resources for improved agriculture and food production in place of bigger and hazardous large dams in the light of growing number of dam bursts due to extreme floodsbeing caused by inensifying cyclones of longer duration and also the frequent number of dam bursts which are about 68 per year in China. See web:http://www.theepochtimes.com/news/6-6-11/42574.html

( Click on " Article by President,ICOLD, See Web: LBergaextremefloods.doc) The latest methods of estimating peak floods by L.berga have to be used for scientific estimates of floods.

GOVERNMENT OF ANDHRA PRADESH

ABSTRACT

Major Irrigation - Nagarjunasagar Dam – Carrying out Dam Break Analysis and Preparation of Emergency Action Plan(EAP) – Proposals for entrusting the work to National Institute of Hydrology, Roorkie –Administrative sanction for an amount of Rs.10,60 lakhs - Accorded-Orders-Issued.

In the circumstances reported by the Chief Engineer, Nagarjunasagar Project, Guntur in the references read above, Government after careful examination of the proposal hereby accord administrative sanction for carrying out Dam Break Analysis and Preparation of Emergency Action Plan (EAP) with estimated cost of Rs10.60 Lakhs along with permission of the Government for entrusting the subject work to National Institute of Hydrology, (NIH) Roorkie for Rs.10.60 ( Rupees Ten Lakhs and Sixty Thousand Only) duly making advance payment of 75% of the total cost at the time of awarding work to the National Institute of Hydrology, (NIH) Roorkie duly incorporating the observations of the Government, in the estimate

1 comment:

Anonymous
said...

The calculations on Alamatti Dam break analysis for Alamatti dam has been done by the Central WATer Commission at the request of the Karnataka state which indicated that even when this 100ft high dam breaks down the flash floods will be confined within the banks of the river and no flood water will overflow the banks on either sideof the river and cause submersionof any of the villages. Whne such an evidence has been presented by Karnataka how did the officials, experts, engineers and advocates of Maharashtra and Andhra Pradesh remained as silent spectators before the tribunal when commonsense tells them that such huge wall of flood will certainly cause flood havoc to hundreds of villages on either side of the bank because the floods banks of Krishna river cannot contain more water than the depth of the river and the embankment portions which together will not be morethan 20ft to 30ft high in most of the sections of the river. Thus both Maharashtra and Andhra Pradesh when asked by the tribunal what injury willbe caused to the states the Governemntofficials by keeping silent have indirectly helped the Brijeshkumar tribunal to give a wrong judgement and thereby they were forced to increase the height of the Alamatti dam from the existing 519m elevation to 524.26m elevation and this elevation will again be increased to 528.3m as recently decided by the Karnataka Government by approaching the Supreme Court for this purpose. Then it is the duty of the people of Andhra Pradesh, Karnatkaa and Maharashtra to take up this life and death issue of submersion of hundreds of villages due to Alamatti dam which can be modified by constrution of small dams and barrages like Hippargi instead of the Karnatkaa Government opting for a big killer dam at Alamatti which may not afterall get the environemntal clearance based upon environmental imapct assessemnt report to be submitted as per the rules of the environemntal protection Act 1986 which provides for submissionof Dam Break Analaysis reports and emergency Action Plan reports which will demonstrate that trhe costs of damage due to a dam collapse at Alamatti will be several times higher than the benefits likely to achieved by constructionof this big killer dam. Even today the people of the basin states must agitate and organsie demonstrations to request the state governments to get the height of the Alamatti dam reduced from +519.6m to 515m to avoid submersioof lands in Maharashtra whose borders stand at an elevation of 518m above the mean sea level. The Prime Minister and the Minister for Environment should make a representation through the Ministryof Water Resources and the Central WAter Commission to request the Brijesh Kumar tribunal not to promote environemntal and economic disasters of the nation but promote susjtainable development and national economic growth by discharging their responsibilites as envisaged under article 51 A(g) of the constitution of Idia.T.V.Rama Rao, M.ComKotabommaliSrikakulam District

About Me

Born in 1932 at Mudinepalli, near Gudivada, Krishna Dist. Andhra Pradesh, received Bachelors degree in Civil Engg., from Viswesaraiah Engineering College, Banglore (1956) and Masters Degree in Environmental Engineering from Rice university, Houston, Texas, (USA) (1962), Ph.D (Hony). Former Head of the Department of Civil Engineering and principal of College of Engineering, Andhra university.Formerly Hony.Professor in Andhra University,Manonmanian Sundarnar University,JNT University. Fellow of the Institution of Engineers,India
Recipient of the University Grants Commissions National Award "Swami Pranavananda Award on Ecology and Environmental Sciences" for the year 1991. Recipient of Sivananda Eminent Citizen Award for 2002 by Sanathana Dharma Charitable Trust, Andhra Pradesh state. Presently Working as Director, centre for Environmental Studies, GITAM University,
http://www.geocities.com/prof_shivajirao/resume.html
http://www.eoearth.org/contributor/Shivaji.rao